Smoke-jack.



S. A. WILLIAMS.-

SMOKE JACK. APPLICATION FILED JULY 21. 1911.

Patented. Oct. 23, 1917.

ffn vanT' -fior: Samuel ,7 mama smoke jacks have usually been made of tint ea s ant SAMUEL ARTHUR WILLIAMS, or LOCKPORT, NEW vaninssrcnon TO THE ASBESTOS unto.

WOOD 00., 0F NASHUA, NEW HAMPSHIRE, A CORPORATIQN OF MAINE.

SMOKE-JACK.

To all whom it may concern Be it known that I, SAMUEL ARTHUR 1I.LIAMs,.a citizen of the United States of America, and resident of Lockport, in the county of Niagara and State of New York, have invented new' and useful Improvements in Smoke-Jacks, of which the following is a specification.

This invention relates to the construction ofsmoke jacks and like ventilating funnels, the invention involving a modified and im-' proved form of the apparatus disclosed in Patent No. 955,290, granted to WV. K. Seige'l April 19, 1910.

In locomotive roundhouses and the like, where the smoke from locomotive funnels is emitted through the roof, the smoke jacks employed to conduct the smoke and gases through the roof are subjected to high temperatures, to the corroding action of the exhaust gases, to excessive vibration due to the pulsations of the locomotive exhaust, and to other severe conditions. Heretofore sheet iron or steel, reinforced at their joints by angle irons, and While these smoke jacks have been fairly well adapted to resist the high temperatures, they have not served to insulate the surrounding portions of the roundhouse from the heat of the engine, and they have been exceedingly shortlived owing to the fact that the acidulous gases from the locomotives rapidly disintegrate the metal. Moreover, the pulsations of pressure produced bv the locomotive exhaust tend to loosen and break the fastenings,

especially after the jack has been subjected to the action of the gases for a considerable period of time. It has also been proposed to construct smoke jacks of fiat plates of refractory material secured to angle-iron framework, but the destruction of the framework and fastenings in this .type'of smoke jack has proceeded in the same way and from the same causes as above mentioned. therebyrendering the smoke jacks unfit. for further use or even for successful repair after a comparatively short time.

' Thus, square or angular corners, which have been characteristic of most types of smoke jacks, have proved to be. detrimental whether the walls of the jack be formed of metal or of refractorymaterial.

As in the prior patent above referred to,

I propose to employ such materials and to shape thejack so as to remedy the defects inherent in the above mentioned types of apparatus, to reduce the number of metal fastenings to a minimum, and to render it possible effectivel to protect the. exposed portions .of metallic fastenings against corrosion. The material which I preferably employ possesses ample physical strength, is non-combustible and is non-corrodible in the presence of acidulousgases. This ma terial is formed as disclosed in the prior Specification of Letters Patent. Patented Oct, 23, 191?, Application filed July 21, 1917. :Serial No. 182,073. i

Patent 969,202, ranted to E. Sobel, vV.

Gold, and-J. Stretch September 6, 1910, which in brief is as follows r A mixture is first madecomprising substantially equal quantities by weight of either very short asbestos fibers or the as bestiform fibers produced by grinding serpentine rock, and a cementitious material which may be eitherv Portland cement or finely commlnuted magnesium oxid. With these solid ingredients is then made a pulp or dough, using a weight of water about equal to the whole weight of the solids.

Immediately .after the'formation of the wet pulp it is subjected to a pressure of about 1000 pounds to the square inch in a hydraulic filter press, after which the feltedsheet thus made is withdrawn and drenched with water. The sheet absorbs this supplemental supply of water to such an extent as to be rendered plastic, and it retains this plasticity for a. sufficient time to allow the. sheet to be molded into almost any desired curved form over suitably shaped wooden molds. Asthe cementitious material in these plastic bodies begins to set from the time the wet pulnis made, it is necessary to give the sheets their final desired shape before the setting operation has proceeded too far. In practice it has been found to be necessary to complete the manufacture of the. molded sheets within fifteen or twenty'minutes afterthe sheets have been taken from the press. lVhen sheets ofthis characteriare completed they can be readily drilledandshaped wither dinary tools, andbyreason of their heat i and acid resisting qualities are well adapted to the construction offmy improved jacka durable, and which are adapted to with stand high temperatures, vibration and the action of acidulous gases. 7

.Other objects of the invention will be apparent from the following description and the accompanying drawings,in which Figure l is a side elevation of one embodiment of my invention;

Fig. 2 is an End elevation of the embodiment shown in F 1;

Fig. 3 is a horizontal cross-section of the stack portion of the jack; 7

"Fig; 4 is a planview of the means for connecting the stack to the base, showing the stack in cross-section; and

Fig. 5" is a section through the preferred means forsecu'ring the parts together. 'The particular embodiment of my invention illustrated in the drawings comprises in general a base portion 1, a stack portion 2, and means '3 for Connecting the stack to the It will be understood that the stack-is irmtended to pass through the roof A of a roundhouse or the like, and I have therefore illustrated a portion 01 a root 4: and means'for forming a tight joint between the stack and the roof comprising a flashing G and a spacing member 7 adapted to fit between the sloping roof and the horizontally disposed'flashing 6, these parts being secured together in any suitable manner. It is also desirable to employ. a cap member over the stack, and l have therefore illustrated such a cap member at 8, this member being mounted on the stack by means of a pair ofstraps 9 extending upwardly from each side of the stack 1 The base portion 1 of my improved smoke jack preferablycomprises four members 11 so shaped and positioned as to term a trunca'ted pyramid having rounded corners, the members being secured together at the sides of the'bas e by means of bands 12 and at their ends by hands13. The if-shaped openingr 14' formed ateach side ofthebase 1 1s preferably covered over by means of a gusset plate 16. Tl e rounded corner menistrips of material, namely, a pair of side stripsll'and a pair of end strips 18. These hers 11 and the gusset plate 16 are preferably formed of one asbestiform material above described, and while the straps 12 and 18 may also be formed of this material, they are preferably formed of metal, inasmuch astheyare disposed wholly on the outside of the base andtherefore do not come in.

contact with the exhaust gases.

"T he stack'21s preferably formed of four strips are overlapped at the four corners otthe staclgtlie stack preferably hating the shapeof a flattened drum, andtheoven lappingjportion's of the strips are secured together" by means of boltsor ivets 19. it

is" essential that the overlapping portions of t ers stiles te s walls at the cornrs oi"- the stack, the stack is not only thereby made more rigid, but the vibrations produced by the pulsations of pressure do not loosen the tastenings between the respective sheets, especially where the overla 'iping portions are'rounded so as to be madeinorerigid. On the contrary, what little vibration that may take place with my iinproycd construction, takes place throughout the broad side walls 17, the flexing of the side Walls occurring not at the points of connection with the end walls, but at and between points where the side walls begin to curve. It the connection between the sheets of material making up the stack were disposed in the central trans verse plane of the stack they would be dis posed in the region of maximum vibration, but when'disposed at the corners as in my improved construction the connections" are disposed at the regions of least vibration and are therefore not loosened by the vibration. And owing; to the unique method of connect ing the side and'end walls together, namely, by overlapping them so as to form rounded corners, the square corners heretofore eniploy'ed are avoided, together with all the disadyantages inCident' thereto. The sheets 1? and 18 are preferably formed of asbesti term fiber as above described, these sheets being tormedinto the shape shown in, Figs. 3 and 4t when manufactured,

The means for connec ing thestaclr 2to hebase '1 comprisesa collar'3 which, while it may be made otii' twopartsasshown in Figs. land 2, is preferably made upof angle irons equal in number to the number of sheets in the s'iaclgnamely, four, as shown? at 522, 23, and 25 in Fig 4:. These angle irons fit into the angle between thestaclr and tl1 'bl$6 and'are secured tothe stack and base by means of rivets or bolts 26. The angle irons are provided at theirends with radial flanges 27 which are secured together by means of bolts 28 so'as to form a cornplate ring about the jack. The angle irons which are secured to theoverlapping pair of-stack' sheets, namely, the endfsheets 18in thedrawings, have 'shorter end fiangesQYl th'andothe angleirons which are connected to theother pair of stack sheets, namely, pair 17. Thus,the vertical portionsofjtheangle irons OfibOliil; the end and I side irons; mayylie against the corresponding sheets of he tack; t esr eti e nsl rons eifn i equalin lengthto the enteriorlyexposedpor? -SJ' e. ang Y irefn are preferably termed of cast iron, and they may, if desired, be provided with radial ribs 29 intermediate their ends, as shown on angle irons 23 and 2st, in order to strengthen the connection between the base and stack.

Suitable means for connecting the various parts together is shown in Fig. 5. This fastening means comprises a bolt 31 passing through the overlapping sheets of material 32 and being provided with washers 83. In order to protect the bolt and washers from the action of the acidulous gases in the 1000- motive exhaust the ends of the bolts and the washers are covered over with a material 3 1 which is adapted to Withstand the chemical action of the gases, a suitable material for the purpose comprising protective cement.

I claim:

'1. A smoke jack comprising a plurality of strips of material joined together so as to form an inclosed passage therethrough, the smoke jack having a rounded corner, and the strips being overlapped throughout the rounded corner. 7

2. In a smoke jack, a stack having the shape of a flattened drum, the sides and ends of the stack comprising separate strips of material overlapping throughout the rounded corners of the stack, and means for securing the overlapping portions of said strips together.

3. In a smoke jack, a drum-shaped stack comprising side walls and end walls composed of molded felted homogeneous cement united asbestiform fiber, the side walls and end walls overlapping at the corners of the stack in smoothly rounded curves, and means for securing the side and end walls together throughout the overlapping portions.

4. In a smoke jack, the combination of a truncated pyramidal base comprising curved corner pieces and gusset plates, a conoidal thimble surmounting the truncated apex of the base, and a stack surmounting the thimble, those members having curved surfaces being composed of molded felted homogeneous cement-united asbestiform fiber, and the side and end walls of the stack being overlapped throughout the major portion of the rounded corners of the stack.

5. In a smoke jack, the combination of a truncated pyramidal base, a stack surmounting the truncated apex oiv the base, the stack comprising side and end walls overlapped to form rounded corners of double thickness, and means for connecting the stack to the base, the connecting means comprising parts secured respectively to the side and end walls of the stack. a

6. In a smoke jack, the combination of a truncated pyramidal base, a stack surmounting the truncated apex of the base, the stack comprising a pair of side walls and a pair of end walls, one pair of walls overlapping the other pair of walls so as to form rounded corners of double thickness, and means for connecting the stack to the base, the connecting means comprising a collar fitting into the angle between the stack and the base and being secured to.

flanges at their ends for securing them to gether in the form of a closed ring, the flanges on the angle irons connecting with the overlapping pair of Walls being shorter than the flanges on the other angle irons so that each angle iron fits against a. wall of the stack.

Signed by'me at Lockport, New York, this lath day of July, 1917.

SAMUEL ARTHUR WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

